What is the function of the transmission oil pump?

1 Answers
OCameron
07/30/25 1:51am
The function of the transmission oil pump is to provide hydraulic pressure for operating control valves and clutches, supply a measured amount of gear oil to the transmission and differential case, and deliver transmission fluid to the cooler for circulation and heat dissipation. Below are some details about the oil pump:1. The oil pump serves as the power source for the entire hydraulic system of an automatic transmission and is typically driven directly by the engine.2. All automatic transmissions have a front pump driven by the engine, and some transmissions also feature a rear pump driven by the output shaft. Common types of oil pumps include internal gear pumps, rotor-type pumps, and vane-type pumps.3. Some transmissions have two oil pumps housed within a single assembly, separated by a partition, operating at the same speed as the engine.
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